Margaret Mary Slaven, PSY.D.
Clinical Psychologist · Fullerton, CA
Margaret Mary Slaven, PSY.D. is a clinical psychologist with a practice address in Fullerton, California, and NPI 1477628923, issued on Nov 21, 2006. Check the license (California PSY19346, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Margaret Mary Slaven
- Credential
- PSY.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY19346 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 N Harbor Blvd, Fullerton, CA 92835
- Phone
- (714) 681-9070
- Enumerated
- Nov 21, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (714) 773-4788
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 1400 N Harbor Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Mary Slaven in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY19346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Margaret Mary Slaven among 12,647 clinical psychologist records in California
Margaret Mary Slaven, PSY.D. is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 80% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 clinical psychologist records list a practice address in Fullerton
They are 55 of the 5,437 NPPES records with a practice address in Fullerton, and 12,647 clinical psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 12,647 in California → Every provider in Fullerton → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Gary Baffa, PHD, M.SFullerton, CA 928351275604001
- Allison Bicksler, PSY.D.Fullerton, CA 928351871928077
- Tim Engle, PSY.D.Fullerton, CA 928351801977327
- Monica Green, PH.D.Fullerton, CA 928351518342690
- Michelle Harriman, PSY.D.Fullerton, CA 928351588799167
- Judith Jensen, PSY.DFullerton, CA 928351679562508
- Monique Montalvo, PSY.D.Fullerton, CA 928351851540181
- Lisa Mori, PH.D.Fullerton, CA 928351639216377
Common questions
What is Margaret Mary Slaven, PSY.D.'s NPI number?
Margaret Mary Slaven, PSY.D.'s National Provider Identifier (NPI) is 1477628923, issued on Nov 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Mary Slaven, PSY.D. located?
The NPPES record lists a practice address at 1400 N Harbor Blvd, Fullerton, CA, 92835. Phone: (714) 681-9070. Providers update this record themselves, so call before visiting.
How can I verify Margaret Mary Slaven, PSY.D.'s license?
NPPES lists California license number PSY19346, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.